Select channel count and input polarity
UE20 digital input modules are available with eight or sixteen channels. N models accept NPN signals with a low-voltage active state; P models accept PNP signals with a high-voltage active state. Each model provides optocoupler isolation, reverse protection and fault diagnostics.
| Model | Channels | Signal type | Process data | System feed current |
|---|
| UE20-8DI-N | 8 | NPN | 1 byte | <25mA |
| UE20-8DI-P | 8 | PNP | 1 byte | <25mA |
| UE20-16DI-N | 16 | NPN | 2 bytes | <30mA |
| UE20-16DI-P | 16 | PNP | 2 bytes | <30mA |
Signal levels and input characteristics
| State | NPN models | PNP models |
|---|
| Logic 0 | 15-30V | -3V to +3V |
|---|
| Logic 1 | -3V to +3V | 15-30V |
|---|
| Characteristic | All models |
|---|
| Signal connection | One-wire |
|---|
| Typical input current | 3mA |
|---|
| Filtering time | 0.3ms |
|---|
| Precision | 0.20%; reference quantity not specified |
|---|
| Reverse protection | Supported |
|---|
| Isolation | Optocoupler isolation |
|---|
| Fault diagnostics | Supported |
|---|
Spring terminal wiring
| Characteristic | 8-channel models | 16-channel models |
|---|
| Connection method | Spring terminal blocks | Spring terminal blocks |
|---|
| Conductor cross-section | 0.2-2.5mm² | 0.2-1.5mm² |
|---|
| AWG conductor range | AWG28-AWG14 | AWG28-AWG16 |
|---|
| Stripping length | 8-9mm | 8-9mm |
|---|
Supply, mounting and environment
| Characteristic | All models |
|---|
| Operating voltage | 24V DC, +20%/-15% |
|---|
| Height × width × depth | 100mm × 12mm × 68mm |
|---|
| Mounting | 35mm DIN rail |
|---|
| Ingress protection | IP20 |
|---|
| Operating temperature | -10°C to +55°C |
|---|
| Storage temperature | -20°C to +85°C |
|---|
| Relative humidity | 5-95%RH, non-condensing |
|---|
